If you have an Android device, go to the Google Play Store.
If you have an iOS device, go to the App Store.
Download and install Duo Mobile on your device.
Once you have installed the Duo Mobile app, you will need to contact the T&I Support Center so they can create your account. The Support Center can be reached at 704-894-2900, email@example.com, or the T&I Main Office (8am-5pm).
Several things to note:
If you can't or don't wish to enroll your smartphone, T&I can give you a hardware token to use
You will need to have this device on you at all times to log into protected sites
That said, if you ever forget your device, you can call T&I to get a temporary passcode that will work for 24 hours.
If you are traveling and do not have access to data or WIFI, the app will still work (ask about the "Enter a passcode" option)